Henry Hill claimed that Paul Vario once showed him a hidden vault that contained over $1 Million in hard cash.
Wikipedia claims Vario was earning about $25,000 a day (even more impressive when you remember this was back in the 60's and 70's).

Roy DeMeo was another good earner.

Joe Pistone said that Tony MIrra would "go nuts" if he didnt pull in $5000 on a weekend from the club he "minded".
Mirra also had a fruit machine racket that fetched in $2000 a week.
Mirra was pretty much a one man outfit though where as DeMeo had a crew behind him.

Its intresting to note what a tight fisted old bas****d Nino Gaggi was though!
He paid his Nephew Dominick Montiglio who was his errand boy and acted as a go between with DeMeo (Nino didnt want to be photographed at the Gemini) a poxy $250 a week!!!
Yet one Christmas he gave Roy DeMeo's 3 kids $5000 each!!!!!
Work that one out!